JP2001022843A - Device and method for processing information and providing medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make utilizable contents at a discounted price corresponding to the purchase history or utilization history of the contents. SOLUTION: The purchase history of contents A whose ID is set to usage control status(UCS) A10 is set to 'purchase history'. For example, the number of times of reproduction or the like is stored and when the number of times is greater than a prescribed number, selection of a prescribed utilization style with a set discounted price is enabled. The utilization history such as how many times contents A are actually utilized is stored in 'utilization history' and when the number of times is greater than the prescribed number, the selection of a prescribed style where a discounted price is set, is enabled.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information processing apparatus and method, and a providing medium, and more particularly, to an information processing apparatus and method using encrypted information and a providing medium.

[0002]

2. Description of the Related Art There is a system in which information (content) such as music is encrypted and transmitted to an information processing device of a user who has made a predetermined contract, and the user decrypts the content with the information processing device and uses it. .

[0003]

In the conventional information processing apparatus, for example, there is a problem that the content cannot be repurchased at a price based on the purchase history of the content.

[0004]

According to a first aspect of the present invention, there is provided an information processing apparatus, comprising: encrypted information; a handling policy indicating the content of a right to be purchased; and a price for specifying a price corresponding to the content of the right. Storage means for storing information; first creation means for creating license condition information including a purchase history of the information based on the handling policy and price information stored in the storage means; use based on use of the information Setting means for setting the history in the license condition information, and second creating means for calculating a billing amount based on the purchase history or the use history and creating billing information including the billing amount when the right is repurchased. And characterized in that:

According to a second aspect of the present invention, there is provided an information processing method comprising the steps of: storing encrypted information; a handling policy indicating the content of a right to be purchased; and price information for specifying price content corresponding to the content of the right. A first creation step of creating license condition information including a purchase history of information based on the handling policy and price information stored in the storage step; and a use history based on use of the information as license condition information. A setting step of setting and, when a right is repurchased, a second creation step of calculating a billing amount based on a purchase history or a use history and creating billing information including the billing amount. I do.

[0006] A providing medium according to claim 3 is a storage step for storing encrypted information, a handling policy indicating the content of the right to be purchased, and price information for specifying price content corresponding to the content of the right. A first creation step of creating license condition information including a purchase history of information based on the handling policy and price information stored in the storage step, and setting a usage history based on use of the information in the license condition information A computer for executing a process including a setting step of performing a second creation step of calculating a billing amount based on a purchase history or a usage history and creating billing information including the billing amount when a right is repurchased. A readable program is provided.

[0007] The information processing apparatus according to claim 1, claim 2,
In the information processing method described in (1) and the providing medium described in (3), the encrypted information, the handling policy indicating the content of the right to be purchased, and the price information for specifying the price content corresponding to the content of the right License condition information including the purchase history of the information is created based on the stored handling policy and price information, the usage history based on the use of the information is set in the license condition information, and the rights are re-created. When a purchase is made, a billing amount is calculated based on the purchase history or the usage history, and billing information including the billing amount is created.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an EMD (El
FIG. 2 is a diagram illustrating an ectronic Music Distribution (electronic music distribution) system. The EMD system includes an EMD service center 1 that manages each device, a content provider 2 that provides content, a service provider 3 that provides a predetermined service corresponding to the content, and a device in which the content is used (a receiver in this example). 50).

[0009] Devices registered in the EMD system (for example,
Content (Conte) distributed (provided) to the receiver 50).
(nt) is digital data in which the information itself has a value. In this example, one content corresponds to music data for one music piece. The content is provided to the user as one content as one unit (single form) or a plurality of contents as one unit (album form). The user purchases the content (actually, purchases the right to use the content), and reproduces or reproduces the provided content.

[0010] As shown in FIG. 2 showing the main information flow in the EMD system, the EMD service center 1 provides the user home network 5 and the content provider 2 with:
The distribution key Kd necessary for using the content is transmitted. The EMD service center 1 also receives billing information and the like from the devices of the user home network 5 and adjusts the fee.

The content provider 2 provides a content to be provided (encrypted with a content key Kco) and a content key Kc required for decrypting the content.
o (encrypted with the delivery key Kd) and a handling policy indicating the content usage (hereinafter referred to as UCP (Usage
Control Policy) is supplied to the service provider 3 in a form called a content provider secure container (described later).

The service provider 3 creates one or a plurality of pieces of price information (hereinafter referred to as PT (Price Tag)) corresponding to the UCP supplied from the content provider 2 and holds the information. The service provider 3 adds the created PT together with the content (encrypted with the content key Kco), the content key Kco (encrypted with the delivery key Kd), and the UCP supplied from the content provider 2, In a form called a service provider secure container, the data is transmitted to the user home network 5 via the network 4 configured by a dedicated cable network, the Internet, satellite communication, or the like.

Based on the supplied UCP and PT, the user home network 5 uses license condition information (hereinafter referred to as U
CS (Usage Control Status) is created, and processing for using the content is executed based on the created UCS. The user home network 5 also creates billing information at the timing of creating a UCS, for example, a delivery key K
At the timing of receiving d, the corresponding UCP and PT
And sends it to the EMD service center 1.

FIG. 3 is a block diagram showing a functional configuration of the EMD service center 1. The service provider management unit 11 supplies profit distribution information to the service provider 3. The content provider management unit 12 transmits the delivery key Kd to the content provider 2 and supplies profit distribution information.

The copyright management unit 13 stores information indicating the use results of the contents of the user home network 5 into a copyright management group, for example, a JASRAC (Japanese Society).
forRights of Authors, Composers and Publishers: Japan Music Copyright Association.

The key server 14 stores a delivery key Kd, and supplies the delivery key Kd to the content provider 2 via the content provider management unit 12 or to the user home network 5 via the user management unit 18 or the like. Supply. The history data management unit 15 stores billing information, a PT corresponding to the content, a UCP corresponding to the content, and the like output from the user management unit 18.

The profit distribution unit 16 includes a history data management unit 15
The profits of the EMD service center 1, the content provider 2, and the service provider 3 are calculated based on the various information supplied from the service provider, and the results are stored in the service provider management unit 11, the content provider management unit 12,
Output to the accounting unit 20 and the copyright management unit 13.

The mutual authentication unit 17 performs mutual authentication with the content provider 2, the service provider 3, and the devices of the user home network 5. User management unit 1
8 executes a process of creating a predetermined registration list corresponding to the predetermined process, transmitting the list to the user home network 5 together with the delivery key Kd, and the like.

The billing request unit 19 includes the history data management unit 15
For example, based on the billing information, UCP, and PT supplied from, a billing to the user is calculated, and the result is supplied to the accounting unit 20. The accounting unit 20 communicates with an external bank or the like (not shown) based on the amount of payment to the user, the content provider 2, and the service provider 3 and the amount of the usage fee to be collected, and executes a settlement process. The accounting unit 20 also notifies the user management unit 18 of the result of the settlement process. Audit Department 2
1 audits the billing information supplied from the device of the user home network 5, the PT, and the legitimacy of the UCP (that is, whether the fraud is performed).

FIG. 4 is a block diagram showing a functional configuration of the content provider 2. Content server 31
Stores the content to be supplied to the user and supplies the content to the watermark adding unit 32. Watermark addition part 32
Adds a watermark (digital watermark) to the content supplied from the content server 31 and supplies the content to the compression unit 33.

The compression unit 33 includes a watermark adding unit 32
Content supplied from ATRAC2 (Adaptive Transf
orm Acoustic Coding 2) (trademark) or the like, and supplies it to the encryption unit 34. The encryption unit 34 uses the random number supplied from the random number generation unit 35 as a key (hereinafter, this random number is referred to as a content key Kco) to encrypt the content compressed by the compression unit 33, such as DES (Data Encryption Standard). The encryption is performed by the key encryption method, and the result is output to the secure container creation unit 38.

The random number generation unit 35 supplies a random number having a predetermined number of bits to be the content key Kco to the encryption unit 34 and the encryption unit 36. The encryption unit 36 determines the content key Kc
o is the delivery key Kd supplied from the EMD service center 1.
And encrypts the data using a common key encryption method such as DES, and outputs the result to the secure container creation unit 38.

DES is an encryption system that uses a 56-bit common key and processes 64 bits of plaintext as one block. The DES processing includes a part (data stirring part) that converts plaintext into ciphertext and a part (key processing part) that generates a key (enlarged key) used by the data stirring part from a common key. Since all the DES algorithms are public, the basic processing of the data agitation unit will be briefly described here.

First, the 64 bits of the plaintext are divided into H _{0 of} the upper 32 bits and L _{0 of the} lower 32 bits. Expanded key K ₁ of 48 bits supplied from the key processing unit, and inputs the lower 32 bits of the L _0, the lower 32 bits of the L ₀
Is output and the output of the F function is calculated. The F function is composed of two types of basic conversion, "substitution" for replacing a numerical value with a predetermined rule and "transposition" for replacing a bit position with a predetermined rule. Next, the upper 32 bits H ₀ and F
The output of the function is XOR, the result is a L _1. L ₀ is set to H ₁ .

The above process is repeated 16 times based on the upper 32 bits H ₀ and the lower 32 bits L ₀ , and the obtained upper 32 bits H ₁₆ and lower 32 bits L ₁₆ are output as ciphertext. You. Decryption is realized by reversing the above procedure using the common key used for encryption.

The policy storage unit 37 stores the UCP set corresponding to the content, and outputs the UCP to the secure container creation unit 38. FIG. 5 shows UCPA in a case where the content A held in the content server 31 is provided in a single form.

As shown in FIG. 5, the UCP includes “content ID”, “content provider ID”, and “UCP I
D, "UCP expiration date", "usage conditions", and "usage contents" are included in predetermined information.
"Content ID" contains the I
D is set. The ID of the content A is set in the “content ID” of the UCPA.

The “content provider ID” is set with the content provider ID of the content provider, and the UCPA “content provider ID” is set with the content provider 2 ID. "UCP I
In "D", a predetermined ID assigned to each UCP is set,
In the “UCP ID” of the UCPA, the UCPA ID is set. In the “expiration date of UCP”, information indicating the expiration date of UCP is set, and in the “expiration date of UCP” of UCPA, the expiration date of UCPA is set.

The "usage condition" includes predetermined information set in each item of "user condition" and "device condition". In the “user condition”, the condition of a user who can select this UCP is set.
The conditions of the device that can select UCP are set.

In the case of UCPA, “Usage condition 10” is set, and “User condition 10” of “Usage condition 10” is set to EMD.
Information (“200 points or more”) indicating that a predetermined use point given in correspondence with the system use frequency or the like is 200 points or more is set. In the “device condition 10” of the “use condition 10”, information indicating that there is no condition (“no condition”) is set. In other words, UCPA can be selected only by users having 200 or more use points.

"Usage content" includes "ID" and "format"
The information set for each item is included. "ID"
The predetermined information assigned to the information set in "Usage Details"
ID is set. In the “format”, information indicating a usage format of the content, such as reproduction or copying, is set.

In the case of UCPA, six “Usage contents 11” to “Usage contents 16” are provided, and “Usage contents 1” are provided.
In “1”, the “ID 11” includes “Usage content 11”.
A predetermined ID assigned to is set. "Format 1
In "1", information ("purchase reproduction") indicating a usage format for purchasing and reproducing the content is set. The user can reproduce the content A without restriction by purchasing the right to use in the usage format of “purchase reproduction” (permitted).

In “Usage content 12”, the “ID1”
"2" is a predetermined ID assigned to "usage content 12"
Is set. In the “format 12”, a usage format of “limited time playback” and a start time (time) and an end time (time) of the period are set. The user can reproduce the content A only for a predetermined period (time) by purchasing the right of “limited period reproduction”.

In “Usage content 13”, the “ID1”
"3" is a predetermined ID assigned to "usage content 13"
Is set. In the “format 13”, a usage format of “use time limited playback” and a predetermined specified time are set.
The user can play the content A until the playback time (total time) exceeds a predetermined time by purchasing the right of “use time limited playback”.

In “Usage content 14”, the “ID1”
"4" is a predetermined ID assigned to "usage content 14"
Is set. "Format 14" includes "Pay Per Play
The usage format of N "and the number of times N are set. The user can play the content A N times by purchasing the right of" Pay Per PlayN ".

In “Usage content 15”, the “ID1”
"5" is a predetermined ID assigned to "Usage content 15"
Is set. In the “format 15”, a usage format of “format 12 → format 11” is set. When the user has already purchased the right to use in the usage format of “limited time reproduction”, the user can purchase this right. By purchasing this right, the user can use the content A in "purchase and reproduction" (format 11).

In “Usage content 16”, the “ID1”
"6" is a predetermined ID assigned to "usage content 16"
Is set. “Format 16” includes “Format 14> =
"Eleventh" is set. The user enters "Pay Per Pl
If there is a history of purchasing 10 or more ayN "rights, this right can be purchased.

Referring back to FIG. 4, the secure container creation unit 38
Are the content A (encrypted with the content key KcoA) and the content key K as shown in FIG.
coA (encrypted with the delivery key Kd), UCPA,
Create a content provider secure container consisting of the content and its signature. The signature is a hash function for the data to be transmitted (in this case, the content A (encrypted with the content key KcoA)), the content key KcoA (encrypted with the delivery key Kd), and the entire UCPA. Is encrypted with the secret key of the public key encryption (in this case, the secret key Kscp of the content provider 2).

The secure container creator 38 also attaches the content provider 2 certificate shown in FIG. This certificate contains the version number of the certificate, the serial number of the certificate assigned by the certificate authority to the content provider 2, the algorithm and parameters used for signing, the name of the certificate authority, the expiration date of the certificate, and the certificate of the content provider 2. Name, content provider 2
Public key Kpcp and its signature (certificate authority private key K
(encrypted with SCA).

The signature is data for checking for falsification and authenticating the creator. The signature is created by obtaining a hash value with a hash function based on the data to be transmitted and encrypting the hash value with a private key of public key encryption. .

The verification of the hash function and the signature will be described. The hash function is a function that receives predetermined data to be transmitted as input, compresses the data into data having a predetermined bit length, and outputs the data as a hash value. The hash function has difficulty in predicting an input from a hash value (output). When one bit of data input to the hash function changes, many bits of the hash value change, and the same hash value is obtained. It has the feature that it is difficult to find the input data that it has.

The recipient who has received the signature and the data decrypts the signature with the public key of the public key encryption, and as a result (hash value)
Get. Further, a hash value of the received data is calculated, and it is determined whether the calculated hash value is equal to a hash value obtained by decrypting the signature. If it is determined that the hash value of the transmitted data is equal to the decrypted hash value, the received data is not falsified,
It can be seen that the data is transmitted from the sender holding the secret key corresponding to the public key. As the signature hash function, MD4, MD5, SHA-1, or the like is used.

Next, public key encryption will be described. In contrast to a common key cryptosystem that uses the same key (common key) for encryption and decryption, the public key cryptosystem uses a different key for decryption and a key for decryption. When using public key cryptography,
One of the keys can be kept public while the other can be kept secret. A key that may be made public is called a public key, and a key that keeps the other secret is called a private key.

A typical RSA (Rivest-Sh) in public key cryptography
amir-Adleman) Briefly explain the encryption. First, two sufficiently large prime numbers p and q are obtained, and further, n which is a product of p and q is obtained. The least common multiple L of (p-1) and (q-1) is calculated, and a number e that is 3 or more and less than L and is relatively prime to L
(Ie, the number that can divide e and L in common is 1
Only).

Next, the multiplicative inverse d of e regarding the multiplication modulo L is determined. That is, ed = 1 between d, e, and L
mod L holds, and d can be calculated by Euclidean algorithm. At this time, n and e are public keys, and p, q, and d are
It is a secret key.

The ciphertext C is calculated from the plaintext M by the processing of equation (1).

C = M ^ e mod n (1) The ciphertext C is decrypted into a plaintext M by the processing of equation (2).

M = C ^ d mod n (2) Although the proof is omitted, the reason that the plaintext is converted to the ciphertext by the RSA encryption and can be decrypted is based on Fermat's little theorem. This is because (3) holds.

M = C ^ d = (M ^ e) ^ d = M ^ (ed) = M mod n (3) If the secret keys p and q are known, the secret key d is calculated from the public key e. However, if the number of digits of the public key n is increased to such an extent that the factorization of the public key n is computationally difficult, the secret key d cannot be calculated from the public key e only by knowing the public key n. Can not. As described above, in the RSA encryption, the key used for encryption and the key used for decryption can be different keys.

[0050] Elliptic curve cryptography, another example of public key cryptography, will also be briefly described. Elliptic curve y ^ 2 = x ^ 3 + ax
Let B be a point on + b. The addition of points on the elliptic curve is defined, and nB represents the result of adding B n times. Similarly, subtraction is defined. Calculating n from B and nB has proven to be difficult. Let B and nB be public keys and n be a secret key. Using the random number r, the ciphertexts C1 and C2 are calculated from the plaintext M using the public key by the processing of Expressions (4) and (5).

C1 = M + rnB (4) C2 = rB (5) The ciphertexts C1 and C2 are decrypted into plaintext M by the processing of equation (6).

M = C1-nC2 (6) Only those having the secret key n can be decrypted. As described above, similarly to the RSA encryption, in the elliptic curve encryption, a key used for encryption and a key for decryption can be different keys.

Referring back to FIG. 4, the mutual authentication unit 39 of the content provider 2 mutually authenticates with the EMD service center 1 before receiving the supply of the delivery key Kd from the EMD service center 1. The mutual authentication unit 39 can also perform mutual authentication with the service provider 3 before transmitting the content provider secure container to the service provider 3. In this example, however, the content provider secure container particularly has a secret. This mutual authentication is not necessarily required, since it does not include any information that must be

Next, the functional configuration of the service provider 3 will be described with reference to the block diagram of FIG. The content server 41 includes a content (encrypted with the content key Kco) included in the content provider secure container supplied from the content provider 2,
The content key Kco (encrypted with the delivery key Kd), the UCP, and the signature of the content provider 2 are stored and supplied to the secure container creation unit 44.

The pricing section 42 is a content provider 2
Verifying the validity of the content provider secure container based on the signature included in the content provider secure container supplied from, and confirming that the content provider secure container is included in the content provider secure container
A PT corresponding to the UCP is created and supplied to the secure container creating unit 44. FIG. 9 shows two PTA-1 (FIG. 9 (A)) and PTA-2 generated corresponding to the UCPA of FIG.
(FIG. 9B). The PT states,
ID "," Content provider ID "," UCP ID "
"UCP expiration date", "Service Provider ID", "P
The information includes predetermined information set in the items of “ID of T”, “expiration date of PT”, “price condition”, and “price content”.

Each item of the “content ID”, “content provider ID”, “UCP ID”, and “UCP expiration date” of the PT includes information on the corresponding items of the UCP. Each is set. That is, PTA-1 and
In the “Content ID” of each PTA-2, the ID of the content A is set to the “Content Provider I”.
"D" contains the ID of the content provider 2, each "UCP ID" contains the ID of UCP A, and each "UCP"
In the “expiration date of P”, the expiration date of UCPA is set.

The “service provider ID” is set with the ID of the service provider that provided the PT. PTA-1
And Service Provider I of PTA-2
In "D", the ID of the service provider 3 is set. The predetermined ID assigned to each PT is set in the “PT ID”, and the PTA-1 ID is set in the “PT ID” of the PTA-1.
However, in the “PT ID” of the PTA-2, the ID of the PTA-2 is set. In the “expiration date of PT”, information indicating the expiration date of PT is set, and the “expiration date of PT” of PTA-1 is set.
In the table, the expiration date of PTA-1 is set, and in the "expiration date of PT" of PTA-2, the expiration date of PTA-2 is set.

The “price condition” includes items of “user condition” and “equipment condition” similarly to the “usage condition” of UCP, and the “user condition” includes a user who can select this PT. Is set in the “device condition”, information indicating the condition of a device that can select this PT is set.

In the case of PTA-1, "price condition 10" is set, and "user condition 10" of "price condition 10" is set with information indicating that the user is male ("male").
In the “device condition 10”, “no condition” is set. That is, only the male user can select PTA-1.

In the case of PTA-2, "price condition 20" is set, and "user condition 20" of "price condition 20" is set with information indicating that the user is a woman ("female"). In the “device condition 20”, “no condition” is set. That is, only the female user can select PTA-2.

The “price content” of the PT includes the usage fee (the price of the right to use the content in the usage format) of the usage format set in the “format” of the “usage content” of the corresponding UCP.
It is shown. "20" of "Price content 11" of PTA-1
00 yen ”and PTA-2“ Price 21 ”“ 1000 ”
“Yen” indicates a fee (a price of a right to use in the “buy-and-play”) usage format when the content A is used in the “buy-and-play” usage format.

"600" of "Price content 12" of PTA-1
Yen ”and“ 300 yen ”of“ Price content 22 ”of PTA-2
Is from "Format 12" of "Usage Content 12" of UCPA.
It shows the price of the right to use the content A in the usage format of “limited time playback.” “Price content 13” of PTA-1
"300 yen" and "Contents of price 23" of PTA-2
"150 yen" is "Format 1" of "Usage Content 13" of UCPA
3 ”indicates the price of the right to use the content A in the usage format of“ use time limited playback ”. The "price content 14" of PTA-1 "100 yen" and the "price content 24" of PTA-2 "50 yen" are the "Usage content 1" of UCPA.
From "Format 14" of "4,""Pay Per PlayN (= 1)"
2 shows the price of the right to use the content A in the usage format.

"1950" of "Price 15" of PTA-1
Yen "and" 980 Yen "of" Price Content 25 "of PTA-2
Is from “Format 15” of “Usage Content 15” of UCPA.
Shows the price of the right of "purchase reproduction" when the user has the right of "limited period reproduction". "50 yen" of "price contents 16" of PTA-1 and "price contents 2" of PTA-2.
"Pay Per PlayN" for the eleventh "25 yen"
(= 1) "indicates the price of the right.

Referring back to FIG. 8, the policy storage unit 43 stores the UCP of the content supplied from the content provider 2.
And supplies it to the secure container creation unit 44. The secure container creation unit 44 includes, for example, content A (encrypted with a content key KcoA), content key KcoA (encrypted with a delivery key Kd), UCPA, and a content provider as shown in FIG. Then, a service provider secure container including the signatures of PTA-1, PTA-1, A-1 and the service provider 3 is created.

The secure container creating unit 44 uses the created service provider secure container for the version number of the certificate, the serial number of the certificate assigned to the service provider 3 by the certificate authority, and the signature as shown in FIG. Algorithm and parameters, name of certificate authority, expiration date of certificate, name of service provider 3,
A service provider certificate including a public key Kpsp of the service provider 3 and a signature is attached to the service provider 3 and supplied to the user home network 5.

Referring back to FIG. 8, the mutual authentication unit 45 performs mutual authentication with the content provider 2 before receiving the supply of the content provider secure container from the content provider 2. Prior to transmission of the service provider secure container to the user home network 5, the mutual authentication unit 45
This mutual authentication is not executed when the network 4 is a satellite communication, for example. In this case, in particular, the content provider secure container and the service provider secure container
Since no confidential information is included, service provider 3
Need not perform mutual authentication with the content provider 2 and the user home network 5.

Next, a configuration example of the receiver 50 configuring the user home network 5 will be described with reference to the block diagram of FIG. SAM (Secure Application Module) 51
Creates a UCS and charging information based on the UCP and PT included in the service provider secure container supplied from the service provider 3, and encrypts the content key Kco (encrypted with the delivery key Kd) included in the service provider secure container. ) And memorize it. FIG.
Are the UCPA shown in FIG. 5 and the PTA-
1 represents a UCSA created based on the price content 11. As shown in FIG. 13, the UCS includes “content ID”, “content provider ID”, and “UCP I
D "," UCP expiration date "," Service Provider I "
D "," PT ID "," PT expiration date "," UCS ID "
Information included in each item of “SAM ID”, “User ID”, “Usage Details”, “Parameter”, and “Purchase History” is included.

In the UCS, “content ID”, “content provider ID”, “UCP ID”, “UCP expiration date”, “service provider ID”, “PT ID”, and “PT validity” In each item of “expiration date”, information of items corresponding to the PT is set. That is, the UCS of FIG.
In “Content ID” of A, the ID of content A is
The “content provider ID” contains the content provider 2 ID, and the “UCP ID” contains the UCP A ID.
"Expiration date" is the expiration date of UCPA, "service provider ID" is the ID of service provider 3,
In the “PT ID”, the ID of PTA-1 is set, and in the “expiration date of PT”, the expiration date of PTA-1 is set.

A predetermined ID assigned to the UCS is set in the “UCS ID”, and the UCSA ID is set in the “UCS ID” of the UCSA.
D is set. "SAM ID" is the SAM ID of the device
Is set, and the “SAM ID” of UCSA is
The ID of the SAM 51 is set. "User ID"
The ID of the user who uses the content is set, and the user ID of the receiver 50 is set in the “user ID” of UCSA.

The "usage contents" are composed of items such as "ID" and "format", and information of the corresponding "usage contents" of the UCP is set therein.
In the “parameter”, information corresponding to the usage format set in “format” of “usage content” is set. For example, UC
If “usage time limited playback” set in “format 13” of “usage content 13” of the PA is set in “format” of “usage content” of UCSA, the “parameter” at that time is , The total time played is set. Also, UC
When “Pay Per PlayN” of “Usage Details 14” of the PA is set, the remaining number of reproducible times is set in “Parameter”. In the “purchase history”, the purchase history of the right for the content whose ID is set to the “content ID” of UCS is set.

In the “usage contents” of UCSA, any one of the “usage contents 11” to “usage contents 16” of UCPA is set.

FIG. 14 shows the billing information A created at the same time as the UCSA shown in FIG. As shown in FIG. 14, the billing information includes “content ID”, “content provider ID”, “UCP ID”, “UCP expiration date”, “service provider ID”, and “PT ID”. "," PT
Expiration date ”,“ UCS ID ”,“ SAM ID ”,“ User ID ”
The information includes predetermined information set in the items of “ID”, “usage content”, and “billing amount”.

The billing information includes “content ID”, “content provider ID”, “UCP ID”, “UCP expiration date”, “service provider ID”, “PT ID”, “PT
Expiration date ”,“ UCS ID ”,“ SAM ID ”,“ User ID ”
In the “ID” and “Usage Details”, information of items corresponding to the UCS are set, respectively. That is, in the billing information A in the figure, the “content ID” is the ID of the content A, the “content provider ID” is the ID of the content provider 2, and the “UCP ID” is the UCPA ID.
However, the "expiration date of UCP" indicates the expiration date of UCPA, and the "service provider ID" indicates the expiration date of service provider 3.
ID is "PT ID", PTA-1 ID is "PT Expiration Date", PTA-1 is expiration date, "UCS ID" is U
The ID of the CSA is "SAM ID", the ID of the SAM 51, the "user ID" is the ID of the user of the receiver 50, and the "usage contents" is the contents of the "usage contents" of UCSA. Is set. In the “charging amount”, when charging at a price other than the price indicated in the “price content” provided in the PT, the amount is set. The method of calculating this amount will be described later.

The SAM 51 also decrypts the content (encrypted with the content key Kco) stored in the external memory 52 based on the created UCS, and
Output to

The external memory 52 stores the content (encrypted with the content key Kco) and the like, and supplies the content (encrypted with the content key Kco) to the SAM 51 in response to a request. Playback unit 53
Is composed of, for example, a D / A converter, converts the content (decoded) supplied from the SAM 51 into an analog signal, and outputs the analog signal to an external device (for example, a speaker).

Next, referring to FIG.
An example of a functional configuration of the SAM 51 will be described. The storage unit 62 stores the UCP included in the service provider secure container.
And PT, and the created UCS. The control unit 61 controls each unit, and when an operation unit (not shown) is operated by the user and a signal for instructing reproduction or purchase of content is input from the operation unit, the control unit 61 stores the signal in the storage unit 62. Processing such as outputting UCP, PT, and UCS to the content key output unit 63 or the billing information generation unit 66 is performed.

The content key output unit 63 holds the content key Kco (encrypted with the distribution key Kd) and, when the content is reproduced, the UCP, PT, and UCS supplied from the control unit 61. The content key Kco (encrypted with the delivery key Kd) is output to the decryption unit 64 based on the information based on whether or not the content can be reproduced. The content key output unit 63 updates the UCS according to the usage format of the content every time the content is reproduced.

The decryption unit 64 decrypts the content key Kco (encrypted with the distribution key Kd) from the content key output unit 63 with the distribution key Kd separately supplied from the EMD service center 1, and Then, the content (encrypted with the content key Kco) read through the interface 65 is decrypted and output to the reproducing unit 53.

When the content is purchased (when the right to use the content is purchased), the charging information generating unit 66 generates charging information according to the right to be purchased, and creates or updates the UCS. Note that the billing information creation unit 6
The billing information generated by 6 is transmitted via the communication unit 67
The data is transmitted to the EMD service center 1 and processed. The communication unit 67 communicates with the service provider 3 or the EMD service center 1 via the network 4 to receive or transmit predetermined information.

Next, the processing procedure of the receiver 50 when purchasing the right to use the content A will be described with reference to the flowchart of FIG. In this case, the service provider secure container shown in FIG.
It is assumed that the data is supplied from the service provider 3 to the receiver 50.

In step S101, an operation unit (not shown) of the receiver 50 is operated by the user, and from the operation unit,
When a signal instructing purchase of the content A (the signal includes the ID of the content A) is input to the control unit 61 of the SAM 51, the control unit 61 determines in step S102 that the content A ID is "Content
It is determined whether or not the UCS set to “ID” is stored in the storage unit 62. If it is determined that the UCS is not stored, the process proceeds to step S103. For example, when the right to use the content A is purchased for the first time, the UCSA in which the ID of the content A is set in the “content ID” as shown in FIG. 13 is not stored in the storage unit 62 ( Since it has not been generated, the process proceeds to step S103.

In step S103, the UCP A included in the service provider secure container shown in FIG.
And PTA-1 and A-2 are taken out and displayed on a display unit (not shown) of the receiver 50, and the user refers to them and
From the UCPA, the operation for selecting the “usage content” whose desired use format is set to “format” is performed by the receiver 50.
Is performed for the operation unit.

In step S104, control unit 61
Is the UCP selected by the user in step S103
The “usage contents” of A, UCPA, and PTA-1, A-2 are output to the billing information generation unit 66. In step S105, the billing information generation unit 66 determines whether the “usage content” of the UCPA selected by the user in step S103 is appropriate, and determines that the “usage format” is appropriate, Proceed to step S106. In this case, since UCSA does not exist, that is, the right to use the content A is purchased for the first time, in step S103, the “usage form 15” or “usage form 16” that can be used when the right is repurchased is changed. If selected, it is determined that it is not an appropriate “usage format”. On the other hand, step S103
When "Usage contents 11" to "Usage contents 14" of UCP A are selected, it is determined that the contents are appropriate "Usage contents".

In step S106, the billing information generation unit 66 determines the "usage content" of the UCP A selected in step S103 and the corresponding PT (in this case, PTA-
1) Based on the "price content", UCS (in this case, U
CSA) and billing information (billing information A in this example) are generated and output to the control unit 61.

In step S107, control unit 61
Causes the storage unit 62 to store the UCSA from the charging information generation unit 66 and the charging information A. When the right to use the content is purchased in this way, the process ends.

If it is determined in step S102 that the UCS including the ID of the content whose right is to be purchased is stored in the storage unit 62, the control unit 61 of the SAM 51 proceeds to step S108, and stores it in the storage unit 62. Read from For example, the right to use the content A is purchased and the UC is
If the right is repurchased while the SA is stored in the storage unit 62, the process proceeds to step S108, and the storage unit 62
Is read from UCSA.

Next, in step S109, the UCSA read in step S108 and, in this case,
UCPA and PTA-1, A stored in the storage unit 62
-2 is displayed on the display unit of the receiver 50.
Referring to this, the operation for selecting the “Usage Details” for which the desired usage format is set to “Format” from UCPA,
The operation is performed on the operation unit of the receiver 50.

In step S110, control unit 61
Is the UCP A selected by the user in step S109
“Usage details” and the UC stored in the storage unit 62
The SA, UCPA, and PTA-1, A-2 are output to the charging information generation unit 66.

In step S111, the billing information generating unit 66 determines whether the “usage content” of the UCPA selected by the user in step S109 is appropriate (UCSA
Is determined) or not. For example, in “Format” of “Usage Details” of UCSA, “Period limited playback” (Format 1
If 2) is set, that is, if “Usage content 12” of UCPA is selected and content A is used in “limited time playback”, “format 12->
“Usage content 1” with “format 11” set to “format”
If "5" is selected, it is determined to be appropriate "usage content". On the other hand, for example, "usage contents" of UCSA
When “Pay Per PlayN” is set in the “Format” of the above, that is, when the content A is used in “Pay Per PlayN”, when “Usage content 15” is selected, It is determined that it is not appropriate “contents”.

Also, "Pay Per" is added to the "purchase history" of UCSA.
In the case where 10 or more purchase histories of PlayN "rights are stored, when" usage content 16 "in which" format 14> = eleventh "is set to" format "is selected, Is determined to be appropriate “contents of use”.
On the other hand, if only less than 11 purchase histories are stored in the “purchase history” of UCSA,
If “6” is selected, it is determined that it is not appropriate “usage content”.

In step S111, step S1
If it is determined that the “usage content” of the UCP A selected in step S09 is appropriate, the process proceeds to step S112, and the charging information generation unit 66 proceeds to step S109.
Based on the “contents” of the PA and the “price details” of the corresponding PTA, create billing information A and
A is updated and output to the control unit 61. In this case,
By updating the UCSA, the purchased right content is added to the "purchase history" of the UCSA. In step S113,
The control unit 61 causes the storage unit 62 to store it. Thereafter, the processing is terminated.

As described above, the right to use the content is purchased (re-purchased), and the accounting is settled by the accounting information (step S106 or step S112) generated at this time.

In the above description, the content of the right to be repurchased is set in the UCP (for example, “Usage content 1” of UCPA).
5 "and" Usage 16 ") and corresponding
Since the price contents of the PT (for example, “price contents 15” and “price contents 16” of PTA-1) are provided, the billing for the purchase of the contents is included in the generated billing information (step S106 or step S112). With the included, for example, UCP ID, UCP usage content ID, or PT ID, the amount of the price content of the corresponding PT is read out and accounted for.

However, it can be assumed that the usage content corresponding to the right to be repurchased is not set in the UCP, and that the price content is not set in the PT.
A predetermined price is set in the "charging amount" of the charging information, and the amount is charged. For example, in the case where “Usage content 15” is not provided in UCPA, when the “purchase reproduction” right is purchased in a state where the “purchase reproduction” right is Price (PTA
-1 from "price content 11" of 2000 yen) to "period limited playback" price (PTA-1 "price content 12" 600
Yen) is subtracted, and the result (1400 (= 2000−
600) yen) is set as the “charging amount” of the charging information.
That is, in this case, the charge is charged for 1400 yen.

In the above description, the case of purchasing the right to use the single-form content has been described as an example. However, the present invention is also applicable to the case of purchasing the right to use the album-form content (a plurality of contents). Can be. The processing procedure of the receiver 50 in this case is shown in FIG.
This will be described again with reference to the flowchart of FIG. In this example, as shown in FIG. 17, a plurality of contents (in this example, four contents 1 to 4) and their corresponding content keys Kco (in this example, four contents keys 1 to 4) As shown in FIG. 18 and FIG. 19, a key 4) is a UCSZ in which a plurality of content IDs (in this example, the IDs of the four contents 1 to 4) are set in the “content ID”. A case where a service provider secure container including a PTZ is supplied from the service provider 3 to the receiver 51 will be described as an example. In the case of this example, in the receiver 50, the content 1 and the content 2
20 is retained (purchased) by using “purchase playback”, that is, UCS1 (ID of content 1) shown in FIG.
Is set), UCS2 shown in FIG. 21 (UCS in which the ID of the content 2 is set), and the content key K
It is assumed that co1 and co2 and content 1 and 2 are held.

In step S101, the operation unit of the receiver 50 is operated by the user, and a signal for instructing the purchase of the content in the form of an album is issued from the operation unit (this signal includes each of the contents 1, 2, 3, and 4). Is included in the control unit 61, the control unit 61 determines in step S102 that the UCS includes the ID of the content 1 and the UCS of the content 2.
Since 2 is stored in the storage unit 62, it is determined that there is a UCS corresponding to the current purchase, and the process proceeds to step S108, where UCSs 1 and 2 are read from the storage unit 62.

Next, in step S109, the UCS 1 and 2 read out in step S108, and in this case, UCPZ and PTZ taken out from the service provider secure container are displayed on the display unit of the receiver 50, and the user With reference to this, an operation for selecting the “usage content 101” of UCPZ is performed on the operation unit of the receiver 50.

In step S110, control unit 61
Is the UCP selected by the user in step S109
The contents of “usage contents 101” of Z, UCS1, UCS2, UCPZ, and PTZ are output to the charging information generation unit 66.

Next, in step S111, the charging information generation unit 66 determines whether or not the “usage content 101” of UCPZ selected by the user in step S109 is appropriate. In this case, "Usage content 1" of UCPZ
“01” is determined to be appropriate “usage content”, and the process proceeds to step S112.

In step S112, the billing information generation unit 66 determines the “usage content 101” of the UCPZ selected in step S109 and the “price content 10” of the PTZ corresponding thereto.
Based on "1", the accounting information is created, and UCS1 and UCS2 are updated. In this case, the “billing amount” of the billing information is PT
An amount (1000 (= 2500−2500−)) obtained by subtracting the amount (for example, 1500 yen) paid when purchasing the right of “purchase and reproduction” of the content 1 and the content 2 from the 2500 price of “price content 101” of Z. 1500) yen) is set.

In step S112, the billing information generating unit 66 outputs the billing information generated in step S112 and the updated UCS1 and UCS2 to the control unit 61. Step S
At 113, the control unit 61 causes the storage unit 62 to store it. Note that, at the timing when the processing of step S113 is executed, the contents 2, 3, 4 and the content key Kc included in the service provider secure container are set.
o2, 3, 4, UCPZ, and PTZ are stored in the external memory 52.

Thus, the right to use the contents in the form of an album is purchased.

Next, the receiver 50 for using the content A on the basis of the usage format corresponding to the purchased right.
Will be described with reference to the flowchart of FIG. That is, in this example, UCSA, UCPA, and
PTA-1 and A-2 are stored in the storage unit 62 and the content A
Are already stored in the external memory 52.

In step S201, when the user operates an operation unit (not shown) of the receiver 50, and a reproduction signal of the content A is input to the control unit 61 from the operation unit, in step S202, the control unit 61 The UCSA is read from the storage unit 62 and the content key output unit 63
Output to

In step S203, the content key output unit 63 outputs the “usage content” of the UCSA from the control unit 61.
It is determined whether or not “purchase reproduction” is set in “format” of the above. If it is determined that “purchase reproduction” is set, the process proceeds to step S204.

In step S 204, content key output section 63 outputs content key KcoA (encrypted with delivery key Kd) to decryption section 64. Thus, in step S205, the reproduction process of the content A (encrypted with the content key Kco) is started. Specifically, the decryption unit 64 converts the supplied content key Kco (encrypted with the delivery key Kd) into an EM
D It decrypts with the delivery key Kd separately supplied from the service center 1, and then decrypts the content (encrypted with the content key Kco) read from the external memory 52 and outputs it to the reproducing unit 53. The playback unit 53 is a content (decrypted) supplied from the decryption unit 64 of the SAM 51.
Is converted into an analog signal, and is output via, for example, a speaker (not shown).

If it is determined in step S203 that "purchase reproduction" is not set in the "format" of "usage contents" of UCSA, the process proceeds to step S206, where the content key output unit 63 sets the "limit period reproduction" It is determined whether or not is set. If it is determined that is set, the process proceeds to step S207.

In step S207, in this case, the content key output unit 63 sets the “usage content” of UCSA in which the start time (time) and the end time (time) are set.
Refer to “Format” to obtain each period (time). Next, in step S208, the content key output unit 62 refers to the built-in clock to detect the current time, and in step S209, the current time is set within the range (time) obtained in step S207. It is determined whether or not there is, and if it is determined that it is within the range, the process proceeds to step S204, and the subsequent processes are executed. That is, the content A is reproduced.

If it is determined in step S209 that the current time is not within the range of the time obtained in step S207, the process is terminated. That is, the content A is not reproduced.

If it is determined in step S206 that "period limited playback" is not set in "format" of "usage contents" of UCSA, the process advances to step S210 to determine whether "use time limited playback" is set. Is determined,
If it is determined that it has been set, step S2
Proceed to 11. In step S211, the content key output unit 63 acquires the playback time with reference to the “parameter” of UCSA, and in step S212,
It is determined whether or not the time exceeds the specified time set in the “format”. If it is determined that the time has not been exceeded, that is, if reproduction is possible, the process proceeds to step S213. If it is determined in step S212 that the reproduction time has exceeded the specified time, the process ends. That is, the content A
Does not play.

In step S213, the content key output section 63 outputs the content key KcoA (encrypted with the delivery key Kd) to the decryption section 64. As a result, in step S214, the reproduction process of the content A is started as in step S205.

Next, in step S215, the content key output section 63 starts measuring the playback time of the content A by using a built-in clock. In step S216, the result of the measurement and the current usage obtained in step S211 are obtained. It is determined whether or not the total with the previous reproduction time exceeds the specified time. If it is determined that the total does not exceed the specified time, the process proceeds to step S217.

In step S 217, the content key output unit 63 determines whether or not the operation unit of the receiver 50 has been operated by the user and the control unit 61 has issued an instruction to stop the reproduction of the content A, and stops the reproduction. If it is determined that there is no command, the process returns to step S216.

If it is determined in step S217 that a command to stop reproduction has been issued, the content key output unit 63
Proceeding to step S218, the measurement of the reproduction time started at step S215 is stopped, and the measurement result and the total of the reproduction time acquired at step S211 are set in the "parameter" of UCSA, and UCSA is updated. Output to the control unit 61. In step S219, the control unit 61
The UCSA updated by the content key output unit 63 is stored in the storage unit 62. Thereafter, the process ends.

If it is determined in step S216 that the reproduction time has exceeded the specified time, the flow also advances to step S218, where the content key output unit 63 sets the clock
The sum of the playback time before this use (time exceeding the specified time) is set in UCSA “parameters” and UCSA
To update. Next, in step S219, the control unit 61 checks the UCS updated by the content key output unit 63.
A is stored in the storage unit 62. Thereafter, the process ends.

If it is determined in step S210 that “usage time limited reproduction” is not set in “format” of “usage content” of UCSA, the process proceeds to step S220.
In this example, since “Pay Per PlayN” is set therein, the number of reproducible times is read by referring to “parameter”, and in step S221, the number of reproducible times is 0.
It is determined whether or not the number has been set, and if it is determined that the number has not been set to 0, the process proceeds to step S222.

Next, in step S222, the content key output section 63 outputs the content key KcoA (encrypted with the delivery key Kd) to the decryption section 64.
Thereby, in step S223, step S2
05 or the process of step S214, the reproduction process of the content A is started.

In step S224, the content key output unit 63 updates the UCSA by decrementing the number of reproducible times set in the "parameter" of the UCSA by one, and then outputs the UCSA to the control unit 61. In, the control unit 61 causes the storage unit 62 to store it.

As described above, the content A is used in a usage format corresponding to the purchased right.

FIG. 23 is a diagram showing the accounting information generating unit 66 of the SAM 51.
Represents another UCSA10 generated by. In the UCSA 10, a “use history” is further provided in the UCSA of FIG. In the “use history”, use results (history) such as the number of times the content A is actually used are stored. For example, if the right of “purchase and reproduction” of the content A has been purchased and the content A has been reproduced M times, the history of the M times reproduced is stored in the “usage history”.

Next, a purchase process using the “usage history” of the UCSA 10 will be described. In the case of this example, a history indicating that the content A has been reproduced 10 times or more is stored in the “usage history” of the UCSA 10, and the UCSA 10 is stored in the storage unit 62. In the case of this example, the receiver 5
In the service provider secure container supplied to the service provider 0, the UCP A 10 shown in FIG.
However, it is assumed that PTA10-1 and PTA10-2 shown in FIG. 25 are included in place of PTA-1 and PTA-2 shown in FIG.

In the UCP A 10 of FIG. 24, “Usage content 17” is further provided in the UCP A of FIG. "Usage content 1
7 ”, the“ ID 17 ”includes“ Usage content 17 ”.
A predetermined ID assigned to is set. "Format 1
In “7”, a usage format of “reproduction count 10 times → format 14” is set. This right can be purchased when the user plays the content A ten or more times.
By purchasing this right, the user can obtain the content A
Can be used in “Pay Per CopyN”.

The PTA 10-1 shown in FIG.
"Price content 17" is further provided in PTA-1 of (A). The PTA 10-2 shown in FIG.
"Price 27" is further provided in PTA-2.
"Price description 17" of PTA10-1 "75 yen" and PTA
The "45 yen" of the "price content 27" of 10-2 is "Pay Per Copy" when the content A is reproduced 10 times or more.
N ".

Next, the purchase process using the “use history” of the UCSA 10 will be described with reference to the flowchart of FIG. When a purchase command is input in step S101, it is determined in step S102 whether or not UCS is stored in the storage unit 62. In this case, UCS
Since A10 is stored in the storage unit 62, step S1
Proceed to 08. The processing of steps S108 to S110 is
Since this is the same as the case described above, the description here is omitted.

In step S111, step S1
At 09, it is determined whether or not the “usage content” of the UCP A10 selected by the user is appropriate. In the case of this example, it is assumed that “Usage content 17” is selected in step S109. In this case, since the history indicating that the content A has been reproduced 10 times or more is stored in the “usage history” of the UCSA 10, it is determined that the “usage content” selected in step S109 is appropriate. Then, the process proceeds to step S112.

In step S112, the billing information generation unit 66 determines the “usage contents 17” of the UCP A10 selected in step S109 and the “price contents 17” of the PTA 10-1 or the “price contents 27” of the PTA 10-2. "
, And generates billing information. That is, in this case, a charge of 75 yen or 45 yen is included, and the price which is lower than the price of the "usage content 14" which can be purchased when the content A is not reproduced 10 times or more is "Pay Per Copy
N "rights are purchased.

As described above, the purchase process based on the usage history is executed. For example, the purchase and reproduction price of the content A is assumed to be 0 yen, that is, the content is provided to the user free of charge, and depending on the number of times the user reproduces the content, the content has been described using music data as an example. Without limitation, moving image data, still image data, document data,
Alternatively, it may be program data. At this time, compression is performed in a method suitable for the type of content, for example, for images, MP
EG (Moving Picture Experts Group) is used.
As the watermark, a watermark suitable for the type of content is used.

In the above description, the case where the contents, the contents keys Kco, UCS, and the like are stored together in the external memory 52 has been described as an example. However, a plurality of memories may be provided and each may be stored. .

In this specification, a system is defined as
It is assumed that the entire device including a plurality of devices is represented.

Further, as a providing medium for providing a user with a computer program for performing the above-mentioned processing,
In addition to recording media such as magnetic disks, CD-ROMs, and solid-state memories, communication media such as networks and satellites can be used.

[0131]

According to the information processing apparatus according to the first aspect, the information processing method according to the third aspect, and the providing medium according to the fourth aspect, license condition information including a purchase history is created. Since the usage history is set in the license condition information, when repurchasing, the billing amount can be calculated based on the purchase history or the usage history.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating an EMD system.

FIG. 2 is a diagram illustrating a flow of main information in an EMD system.

FIG. 3 is a block diagram showing a functional configuration of the EMD service center 1.

FIG. 4 is a block diagram illustrating a functional configuration example of a content provider 2.

FIG. 5 is a diagram illustrating an example of UCP.

FIG. 6 is a diagram illustrating an example of a content provider secure container.

FIG. 7 is a diagram showing an example of a certificate of a content provider 2.

FIG. 8 is a block diagram showing a functional configuration of the service provider 3.

FIG. 9 is a diagram illustrating an example of a PT.

FIG. 10 is a diagram illustrating an example of a service provider secure container.

FIG. 11 is a diagram illustrating an example of a certificate of a service provider 3;

FIG. 12: Receiver 50 of user home network 5
FIG. 3 is a block diagram showing an example of a functional configuration of FIG.

FIG. 13 is a diagram illustrating an example of a UCS.

FIG. 14 is a diagram illustrating an example of billing information.

FIG. 15 is a block diagram illustrating a functional configuration example of a SAM 51 of a receiver 50.

FIG. 16 is a flowchart illustrating a content purchase process.

FIG. 17 is a diagram illustrating another example of the service provider secure container.

FIG. 18 is a diagram showing another example of UCP.

FIG. 19 is a diagram showing another example of a PT.

FIG. 20 is a diagram showing another example of UCS.

FIG. 21 is a diagram showing another example of UCS.

FIG. 22 is a flowchart illustrating a content use process.

FIG. 23 is a diagram showing another example of UCS.

FIG. 24 is a diagram showing another example of UCP.

FIG. 25 is a diagram showing another example of a PT.

[Explanation of symbols]

1 EMD service center, 2 content provider, 3 service provider, 5 user home network, 50 receiver, 51 SAM, 52
External memory, 53 playback unit, 61 control unit, 62
Storage unit, 63 content key output unit, 64 decryption unit, 65 interface, 66 charging information generation unit,
67 Communication unit

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H04L 9/00 675B (72) Inventor Taizo Shirai 6-7-35 Kita Shinagawa, Shinagawa-ku, Tokyo Sony F term in reference (reference) 5B049 AA05 BB11 CC05 CC36 CC48 DD05 EE01 EE03 EE09 EE59 FF00 FF06 GG04 GG07 GG10 5B089 GA11 GA21 GB04 HA10 JA08 JB05 KA15 KB06 KB12 KH30 5D044 AB05 DE48 GK17 A070704 JJ72 KK43 KK56 LL03

Claims (3)

[Claims] 1. An information processing apparatus for decrypting and using encrypted information in accordance with the content of a purchased right, wherein the information indicating the encrypted information and the content of the purchased right are displayed. Storage means for storing price information specifying a policy, price content corresponding to the content of the right, and use including purchase history of the information based on the handling policy and the price information stored in the storage means. First creating means for creating license condition information; setting means for setting a use history based on use of the information in the license condition information; when the right is repurchased, the purchase history or the use history An information processing apparatus comprising: a second creation unit that calculates a billing amount based on the billing amount and creates billing information including the billing amount. 2. An information processing method of an information processing apparatus for decrypting and using encrypted information in accordance with the content of a purchased right, comprising the steps of: A storage policy for storing a handling policy indicating the content, price information for specifying price content corresponding to the content of the right; and a purchase history of the information based on the handling policy and the price information stored in the storing step. A first creating step of creating license condition information including: a setting step of setting a use history based on the use of the information in the license condition information; and A second creation step of calculating a billing amount based on the usage history and creating billing information including the billing amount. 3. An information processing apparatus that decrypts and uses encrypted information in accordance with the content of the purchased right is provided to the information processing apparatus that displays the encrypted information and the content of the purchased right. A storage step of storing price information that specifies a policy, price content corresponding to the content of the right; and a license including a purchase history of the information based on the handling policy and the price information stored in the storage step. A first creating step of creating condition information; a setting step of setting a use history based on the use of the information in the license condition information; and when the right is repurchased, the purchase history or the use history A computer-readable program for executing a process including calculating a charging amount based on the charging amount and generating charging information including the charging amount. Providing medium characterized by Rukoto.